Bis(phosphane oxide) adducts of Rh2(MTPA)4 - Kinetics and chirality discrimination

Tamás Gáti, András Simon, Gábor Tóth, Anna Szmigielska, Anna M. Maj, K. Michał Pietrusiewicz, Stefan Moeller, Damian Magiera, Helmut Duddeck

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Abstract

The symmetrical bis(phosphane oxide) 1 and its chiral derivatives 2 and 3 form a variety of adduct species with the dirhodium complex [Rh-Rh] which can be identified by low-temperature 1H and 31P NMR spectroscopy by using varying [Rh-Rh]: ligand ratios. The asymmetric bis(phosphane oxide) 3 shows a distinct preference for binding through the Ph2P= O (P a) as compared to the tBu(Ph)P=O (Pb) functionality due to the bulky tert-butyl group. The chiral bis(phosphane oxides) 2 and 3 form complex mixtures of various adduct species. Nevertheless, it is possible to monitor enantiomeric compositions from various NMR signal duplications at 213 K and even at room temperature or slightly elevated temperatures.

Original languageEnglish
Pages (from-to)2160-2166
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Issue number10
DOIs
Publication statusPublished - May 17 2004

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Keywords

  • Chiral discrimination
  • Complexation modes
  • NMR spectroscopy
  • Phosphane ligands
  • Rhodium

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Gáti, T., Simon, A., Tóth, G., Szmigielska, A., Maj, A. M., Pietrusiewicz, K. M., Moeller, S., Magiera, D., & Duddeck, H. (2004). Bis(phosphane oxide) adducts of Rh2(MTPA)4 - Kinetics and chirality discrimination. European Journal of Inorganic Chemistry, (10), 2160-2166. https://doi.org/10.1002/ejic.200300853